May 04, 2020
The aim of this study was to develop an oral vaccine that could be used to treat colorectal cancer. Oral vaccines are technically challenging to develop due to the harsh gastric environment but have numerous benefits including high patient acceptability and the potential to stimulate local mucosal immune responses. Therapeutic vaccines are being investigated as options to treat cancer and the generation of local mucosal immunity may be of benefit in the treatment of gastrointestinal cancers. Novel oral vaccines consisting of a long tumour peptide and the TLR2 (Toll-like receptor 2) ligand Pam2Cys, formulated in either liposomes or W/O/W double emulsions, were developed. Oral dosing with the emulsion vaccine increased the numbers of activated T cells, B cells and CD11c+F4/80+CD11b+ cells compared to mice that received control vaccines. In an orthotopic mouse model of colorectal cancer these immunological changes were associated with a seven-fold reduction in tumour size.
Publication - Summary
Sep 01, 2017
Scientific Reports
Currently, clinically approved medicines with liposomal formulations have a combined annual revenue of approximately $100 million USD, but their difficult and expensive production methods make more widespread use prohibitive. Microfluidic devi...
Publication - Abstract
Aug 03, 2020
Vaccines
In this in vitro and in vitro study, the Yoshioka lab at Osaka University investigated cytosine–phosphate–guanine oligodeoxynucleotides (CpG ODN) lipid nanoparticles (LNPs) as an adjuvant for seasonal split vaccines (SV) from influenza virus antig...